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55 lines
1.1 KiB
55 lines
1.1 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2011 The ChromiumOS Authors. All rights reserved. |
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*/ |
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#include <common.h> |
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#include <console.h> |
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#ifndef CONFIG_SYS_COREBOOT |
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#error This driver requires coreboot |
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#endif |
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#include <asm/arch/sysinfo.h> |
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struct cbmem_console { |
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u32 buffer_size; |
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u32 buffer_cursor; |
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u8 buffer_body[0]; |
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} __attribute__ ((__packed__)); |
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static struct cbmem_console *cbmem_console_p; |
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void cbmemc_putc(struct stdio_dev *dev, char data) |
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{ |
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int cursor; |
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cursor = cbmem_console_p->buffer_cursor++; |
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if (cursor < cbmem_console_p->buffer_size) |
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cbmem_console_p->buffer_body[cursor] = data; |
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} |
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void cbmemc_puts(struct stdio_dev *dev, const char *str) |
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{ |
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char c; |
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while ((c = *str++) != 0) |
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cbmemc_putc(dev, c); |
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} |
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int cbmemc_init(void) |
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{ |
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int rc; |
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struct stdio_dev cons_dev; |
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cbmem_console_p = lib_sysinfo.cbmem_cons; |
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memset(&cons_dev, 0, sizeof(cons_dev)); |
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strcpy(cons_dev.name, "cbmem"); |
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cons_dev.flags = DEV_FLAGS_OUTPUT; /* Output only */ |
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cons_dev.putc = cbmemc_putc; |
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cons_dev.puts = cbmemc_puts; |
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rc = stdio_register(&cons_dev); |
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return (rc == 0) ? 1 : rc; |
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}
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